Astrophysics

    

Frozen Hydrogen-Helium Snowballs for Galactic Dark Matter

Authors: Alan M. Kadin

Most of the mass in galaxies is distributed in a halo larger than the galaxy itself, but not associated with stars or other known physical objects. Most candidates for this “dark matter” are novel fundamental particles or primordial black holes, rather than ordinary atoms. On the contrary, it is suggested here that dark matter in these extragalactic halos may comprise comet-like frozen hydrogen snowballs. If their temperature is close to that of cosmic black-body radiation (2.7K), these snowballs should be stable for long time periods. Recent observations suggest that similar hydrogen snowballs may exist in cold interstellar regions. If these snowballs can also trap helium atoms (which may be tested in cryogenic laboratory experiments), this could account for the invisible missing mass.

Comments: 5 Pages. Essay written for Gravity Research Foundation 2021

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Submission history

[v1] 2021-05-19 16:39:16

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